Please Answer???

[mesy64]

hi to all
Whether the device is used as the Earth's magnetic field sensor.Whether it is for the detection of metals located in the basement can be used remotely?

[WM6]

Originally Posted by mesy64

hi to all
Whether the device is used as the Earth's magnetic field sensor.Whether it is for the detection of metals located in the basement can be used remotely?

Only for bigger metal ore deposits (especially Ferro type) in soil which can cause sensible anomalies in Earth magnetic field. Not useful for small targets.

But can work the same way as most known LRL pistols.

[Fred]

OMG ! this is a modern copy of the PD !

[mesy64]

tank you wm6
What can be the circuit's sensitivity to small metals such as coins would not?
What do you mean the big metal?What size?
Whether it is used as a real pD?
e high sensitivity of the large size of the ferrite and coil circuit?

[Zocky-Zocky]

Dear Friends!
This VLF Reciver I took over from the Greek Forum "Psaxtiria":
http://www.psaxtiria.net/forum/index.php


Uploaded with ImageShack.us

Please Geotech1 more experienced forum members to provide their solution ferrite coil for the VLF Reciver.
Thanks in advance!
Regards
Zocky-Zocky

[WM6]

Originally Posted by mesy64

tank you wm6
What can be the circuit's sensitivity to small metals such as coins would not?
What do you mean the big metal?What size?
Whether it is used as a real pD?
e high sensitivity of the large size of the ferrite and coil circuit?

For coin it cannot be used for sure.

For other target sensitivity depend on "virginity" of terrain: in soil hard polluted with civilisation trash there will be too much disturbing signals to differentiate it from useful signals. On clear terrain you can detect one 50x50cm metallic plate at some meter distance (it depend on detecting angle too).

Of course sensitivity (in fact directivity) depend on how large ferrite rod is (you can glue two ferrite rod together to enlarge it).

You need first to tune your Earth signal detector to strongest and steady signal (Earth signals are not the same during time of day).

[kt315]

Whether it is for the detection of metals located in the basement can be used remotely?

good probe for all any electro-magnetic sources' types detection. you will see and learn how much our planet had been dirtied by so named white noise spectre (american and europe union hitech industry does all your probe is working fine). practical value there is not.

[mesy64]

Originally Posted by WM6

For coin it cannot be used for sure.

For other target sensitivity depend on "virginity" of terrain: in soil hard polluted with civilisation trash there will be too much disturbing signals to differentiate it from useful signals. On clear terrain you can detect one 50x50cm metallic plate at some meter distance (it depend on detecting angle too).

Of course sensitivity (in fact directivity) depend on how large ferrite rod is (you can glue two ferrite rod together to enlarge it).

You need first to tune your Earth signal detector to strongest and steady signal (Earth signals are not the same during time of day).

tank you very much wm6
Please help me to build a sensitive ferrite and information necessary to make the antenna give???
Wire and the wires and the ferrite???
waiting your answer
whith recpect

[J_Player]

Originally Posted by WM6

For coin it cannot be used for sure.

For other target sensitivity depend on "virginity" of terrain: in soil hard polluted with civilisation trash there will be too much disturbing signals to differentiate it from useful signals. On clear terrain you can detect one 50x50cm metallic plate at some meter distance (it depend on detecting angle too).

Of course sensitivity (in fact directivity) depend on how large ferrite rod is (you can glue two ferrite rod together to enlarge it).

You need first to tune your Earth signal detector to strongest and steady signal (Earth signals are not the same during time of day).

Hi WM6,
This could be used as a nice metal detector for large objects.
But I was wondering if you can post a circuit with tuning instructions for a long range detector that gives a flat response over the treasure metal band?
I am mostly interested in the gold/silver band, but I also would like to detect the platinum alloys which might be found when people lose their jewelry at the beach.

A simple analogue circuit with ferrite would be good, but I prefer a hybrid with a 256 channel detector plus 4 application Specific Integrated Circuits (ASICs), comprising 64 channels each, which perform front end analogue signal processing, A/D conversion and multiplexing.
of course, the unit must be portable to carry into the field.
And it must be able to contend with the rigors of hiking over hill and dale, and must be rugged enough to withstand occasional dropping in the mud during the treasure hunting operations.
However, if the platform is spin-stabilised, the earth image could be stabilised on the detector using a de-spin mirror.
Then the earth image would be present on the detector only for 40 ms at the most, and the S/N could be kept to acceptable levels for jewelry recovery purposes.

Maybe this is too much to ask, but I would like if you can post a project that can do this if it is possible.


Best wishes,
J_P

[teknoloji]

Originally Posted by mesy64

hi to all
Whether the device is used as the Earth's magnetic field sensor.Whether it is for the detection of metals located in the basement can be used remotely?

I wonder what year is the number of this Elektor.?

[WM6]

Originally Posted by teknoloji

I wonder what year is the number of this Elektor.?

I am wonder too.
I even cannot find where I am posting first time this circuit here on forum. Mesy not decided to got us link.

[J_Player]

Originally Posted by WM6

I am wonder too.
I even cannot find where I am posting first time this circuit here on forum. Mesy not decided to got us link.

Hi WM6,

Here is where you first posted this circuit: http://www.geotech1.com/forums/showt...86#post=131986


Best Wishes,
J_P

[WM6]

Originally Posted by J_Player

Hi WM6,

Here is where you first posted this circuit: http://www.geotech1.com/forums/showt...86#post=131986


Best Wishes,
J_P

Thanks J_P.

With two glued ferrite antenna rods we can get of about 40cm long ferrite antena.

Pistol can be build by this antenna and proposed circuit according this Erevnitis design: